ANC10CA047

NTSB accident investigation · Piper PA-22-160 · Port Alsworth, AK · June 1, 2010

Accident · No injuriesData collectionFinal report
Date
May 31, 2010, 20:30 local (Jun 1, 2010, 04:30 UTC)
Place
Port Alsworth, AK
Injuries
2 uninjured
Damage
Substantial damage
Phase of flight
Takeoff
Aircraft
N9217DPiper PA-22-160
Defining event
Takeoff: Collision during takeoff/land
Weather
Visual (VMC) · Day
Status
Completed · report December 20, 2010
Report
Approved by Office Director
NTSB office
Alaska Regional Office
Parties
FAA Flight Standards District Office
FAA report
20100531035439A
Case key
76165

From the NTSB’s public API. By law, NTSB reports can’t be used as evidence in lawsuits over the accident.

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Probable cause

The pilot's selection of unsuitable terrain for takeoff and inability to abort the takeoff, resulting in an overrun into the water.

Findings · 2

NTSB’s coded findings. Those marked are part of the probable cause; the rest are factors or other findings. Under each, the cases with the same finding.

Sequence of events

The events NTSB coded, in order, by phase of flight. The defining event is the one that best describes the accident. Under each, the cases with the same event anywhere in their sequence.

Analysis

The pilot was departing from a gravel bar when the accident occurred. He stated that prior to the takeoff he examined the gravel bar for the firmest ground for the takeoff roll. After the tail came up during the takeoff roll, the pilot realized that he was not aligned along his intended takeoff path. The pilot was not able to abort the takeoff roll and rolled from the gravel bar to the water. The airplane came to rest in the water inverted, resulting in substantial damage to both wings and the empennage. The pilot verified that there were no mechanical anomalies with the airplane prior to the accident.

Factual narrative

The pilot was departing from a gravel bar (1,200 feet long as estimated by the pilot, sand and gravel) on a Title 14 CFR Part 91 personal flight when the accident occurred. He stated that prior to the takeoff he examined the gravel bar for the firmest ground for the takeoff roll. After the tail came up, during the takeoff roll, the pilot realized that he was not aligned along his intended takeoff path. The pilot was not able to abort the takeoff roll and rolled from the gravel bar to the water. The airplane came to rest in the water inverted resulting in substantial damage to both wings and the empennage. The pilot verified that there were no mechanical anomalies with the airplane prior to the accident.

Aircraft

Registration
N9217D
Reported as
Piper PA-22-160
Category
Airplane
Serial number
22-6277
Airframe hours
2,639
Engine
Lycoming O-320-A2B, 150 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Airworthiness certificate
Standard, Normal
Last inspection
Annual · May 9, 2009
Departed
PALJ · Port Alsworth, AK
Destination
Port Alsworth, AK
Flight plan
Unknown

Matched to the registry by N-number and the event date; the registry’s history has gaps, so older matches can be wrong. Compare the reported make and model.

Flight crew

As NTSB recorded them. NTSB leaves out names.

Role
Pilot
Age
21
Injuries
None
Certificate
Commercial
Airplane ratings
Single-engine land, Multi-engine land
Instrument ratings
Airplane
Medical
Class 2, Without waivers/limitations
Seat
Left
Flight hours
565 total · 264 in this make and model · 466 as pilot in command · 23 in the last 90 days · 23 in the last 30 days · 3 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
360° at 6 knots
Visibility
30 statute miles
Lowest ceiling
25,000 ft broken
Temperature
66 °F, dew point 46 °F
Altimeter
29.51 inHg
Observed at
PALJ, 21 nm away

Docket · 1

The files NTSB released with the investigation on September 7, 2010, on NTSB’s docket system: statements, records, photos and specialists’ reports. 998 KB in all.

FAA reports on this event · 1

The FAA’s own accident and incident reports, matched to the aircraft by N-number and date.